The San Gorgonio Mountains in Southern California are home to a population of desert bighorn sheep. At least 20 bighorn have died in the past few months. Click on the link below to learn more about what is being done to investigate the causes of the mortality event, and the important collaborative roles played by California Fish and Wildlife field biologists and veterinarians, land owners, California Animal Health and Food Safety Laboratory, and volunteers.
All photos provided by Jaime Rudd
Work continues in investigating the deadly mange infestation in the endangered San Joaquin kit fox. Endangered Species Recovery Program and the California Department of Fish and Wildlife, Wildlife Investigations Laboratory are collaborating efforts to research the local population in Bakersfield.
To learn more and to find out how you can help, please click on the link below.
In early August, CDFW personnel rescued a young female black bear near Whiskeytown in Shasta County. The bear had severe burns to all four of her paws as a result of the Carr wildfire. Following her rescue, the 1.5-year-old bear spent just over one month recovering at the Wildlife Investigations Laboratory where she received tilapia fish skin treatments and other therapies to assist with healing. The recovery was deemed successful – all four paws re-epithelialized, regained function, and the bear put on a significant amount of weight – and she was released back into the wild in mid-September. Due to challenges with placing a collar on a still-growing wild animal, the WIL turned to an international company, GPS Collars Ltd., for an alternative tracking device: the EarTraX V2 GPS/GSM/UHF wildlife telemetry ear tag (https://www.gpscollars.co.uk/product-EarTraX-GPS-GSM-UHF-id5). In addition to being less obtrusive than a collar, the solar-powered unit will utilize existing cellular networks to transmit the bear’s location. The data collected will provide CDFW with valuable insight into bear behavior and landscape usage in post-wildfire areas
Please go to California Department of Fish and Wildlife Facebook page for the latest update on the two bears that were burned in the Thomas Fire in late December/early January! Both bears were suffering from extensive burns to their paws when they were brought to CDFW’s Wildlife Investigations Lab in northern California. The link to the Facebook page is below.
Since 2014, CDFW-WIL has partnered with UC Davis in order to create and maintain a breeding colony of Amargosa voles essential to the recovery of the species. If interested in learning more about the history and progress of the colony, please read more here. Below is a video showing a few of the vole pups bred in captivity (Credit: Janet Foley).
In the Spring of 2016, CDFW (WIL and Region 6), UC Davis, BLM, USFWS, and many volunteers partnered to restore a key habitat patch utilized by the Amargosa vole. This habitat patch used to sustain the highest density of Amargosa voles in the world, but in 2010 it began to deteriorate due to changes in hydrology. The Amargosa vole team worked diligently to restore the water supply and reinvigorate vegetation growth at the marsh. Learn more about the Amargosa vole project.
[*Note from the lab’s Dr. Deana Clifford: Wev’e been a bit quiet for a while, but not because we’ve disappeared. We are re happy to start back up again with a 3 part special series updating everyone about our exciting multi-agency/academia/NGO effort to save the critically endangered Amargosa vole. Stay tuned-more posts coming from our activities including voles, fishers, and bighorn sheep!]
By Austin Roy (CDFW WIL Scientific Aid) & Anna Rivera (CDFW Volunteer)
Captive breeding can sometimes be an effective conservation method in the toolbox available to wildlife managers. It’s often employed as a last resort when other conservation efforts have not succeeded. Wild-caught animals are brought into a captive environment and mated for the purpose of increasing the species’ numbers and/or to create an insurance population in case the wild population goes extinct. Captive breeding programs have helped in recovery efforts for several endangered species including the California condor, black-footed ferret, island fox, and peregrine falcon.
Our research team from CDFW and UC Davis have been monitoring the population of the endangered Amargosa vole (Microtus californicus scirpensis). In July, we observed that the habitat of the marsh where most remaining voles live was rapidly degrading. At the same time, vole numbers were rapidly increasing as part of a normal birth pulse cycle. The shrinking marsh was not going to be able to support the number of voles being born so we consulted with our collaborators in the Amargosa vole working group (the US Fish and Wildlife Service, Bureau of Land Management, US Geological Survey, and UC Berkeley) and brought 20 young voles (that would have likely died in the wild) into captivity to try to establish an insurance population of voles.
Ten males and 10 females were brought to UC Davis and placed into indoor quarantine in late July 2014. Individuals underwent disease and genetic testing to decide which individuals would be paired for mating. After quarantine, voles were placed into pairs for mating.
In October, we successfully weaned our first litter of Amargosa vole pups! This is the first step to expanding the captive population to the point when animals can begin to be released into the wild to supplement the wild population. The voles are currently being housed indoors, but we are in the process of creating outdoor pens for the voles where they will experience conditions more closely resembling their natural marsh environment.
While a small step has been made towards the recovery of this endangered species and the path forward remains long, our team remains committed to saving the Amargosa vole.
Click on the links below to read about the Amargosa vole captive breeding program and see more pictures: